save() on espruino_1v91.122_esp8266 results in immediate Disconnected prompt

I have built code with webpack. Result bundle was 7K. It is pretty much same as buint by espruino-tool but without require statements.

In this case Espruino tried to save 15KB to flash as well.

I saw thread on GitHub regarding ESP8266_4M version.
Are you going to extend memory to 64K? If code size is actually takes twice amount of memory it can bee too little.

NodeMCU (lua version) ables to use whole chip memory.